Headline
GHSA-57m8-f3v5-hm5m: Netty-handler does not validate host names by default
Netty-handler has been found to no validate hostnames when using TLS in its default configuration. As a result netty-handler is vulnerable to man-in-the-middle attacks. Users would need to set the protocol to “HTTPS” in the SSLParameters of the SSLEngine to opt in to host name validation. A change in default behavior is expected in the 5.x release branch with no backport planned.
In the interim users are advised to enable host name validation in their configurations. See https://github.com/netty/netty/issues/8537 for details on the forthcoming change in default behavior.
Netty-handler does not validate host names by default
Moderate severity GitHub Reviewed Published Oct 4, 2023 to the GitHub Advisory Database • Updated Oct 4, 2023
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